读modbus命令并返回数据奇怪问题，求大声答疑！！！

Question

modbus  返回数据故障通信modbus

Answer 1

public void SendData(byte[] data, int offset, int count)
        {
            //禁止接收事件时直接退出
            if (ReceiveEventFlag)
            {
                return;
            }
            try
            {
                if (_serialPort.IsOpen)
                {
                    _serialPort.Write(data, offset, count);
                    ReceiveEventFlag_Power = false;
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }